Browse Prior Art Database

SPRING RAMP PAPER TRAY WITH CONSTANT LEAD EDGE HEIGHT

IP.com Disclosure Number: IPCOM000024512D
Original Publication Date: 1980-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 63K

Publishing Venue

Xerox Disclosure Journal

Abstract

It is frequently desired to hold contant the height of the lead edge of a stack of sheets. This may be achieved even for stacks of different depths and lengths with the illustrated hinged tray. The paper tray includes a fixed floor portion 12 and a movable ramp 14 connected by hinge 18, the end of the movable ramp 14 being urged up by spring 20. Paper of a given width is loaded to the front of the ramp and supported at the rear of the floor by a backstop 24. By moving the backstop horizontally different lengths of paper can be positioned on the ramp. The spring constant of the ramp is chosen such that the weight of one piece of paper depresses the front of the ramp by exactly one paper thickness, thereby keeping the lead edge height the same even though the stack height may vary. A comparison of the two figures illustrates how the lead edge height b remains the same for different stock heights a and a2.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

IXEROX DISCLOSURE JOURNAL

SPRING RAMP PAPER TRAY WITH CONSTANT LEAD EDGE HEIGHT Richard Carter Benson

Proposed Classification
U.S. CI. 271/162 Int. Cl. B65h 1/00

, p20 I4 18 a2 =1 a4== 12 '

It is frequently desired to hold contant the height of the lead edge of a stack of sheets. This may be achieved even for stacks of different depths and lengths with the illustrated hinged tray. The paper tray includes a fixed floor portion 12 and a movable ramp 14 connected by hinge 18, the end of the movable ramp 14 being urged up by spring 20. Paper of a given width is loaded to the front of the ramp and supported at the rear of the floor by a backstop 24. By moving the backstop horizontally different lengths of paper can be positioned on the ramp. The spring constant of the ramp is chosen such that the weight of one piece of paper depresses the front of the ramp by exactly one paper thickness, thereby keeping the lead edge height the same even though the stack height may vary. A comparison of the two figures illustrates how the lead edge height b remains the same for different stock heights a and a2.

1

-----A-

j?-24 - -- --A-

1

[This page contains 1 picture or other non-text object]

Page 2 of 2

     XEROX DISCLOSURE JOURNAL Volume 5 Number 6 November/December 1980

594

[This page contains 1 picture or other non-text object]